void accel_set_func(glui32 index, glui32 addr)
{
int bucknum;
accelentry_t *ptr;
int functype;
acceleration_func new_func = NULL;
/* Check the Glulx type identifier byte. */
functype = Mem1(addr);
if (functype != 0xC0 && functype != 0xC1) {
fatal_error_i("Attempt to accelerate non-function.", addr);
}
if (!accelentries) {
accelentries = (accelentry_t **)glulx_malloc(ACCEL_HASH_SIZE
* sizeof(accelentry_t *));
if (!accelentries)
fatal_error("Cannot malloc acceleration table.");
for (bucknum=0; bucknum<ACCEL_HASH_SIZE; bucknum++)
accelentries[bucknum] = NULL;
}
new_func = accel_find_func(index);
/* Might be NULL, if the index is zero or not recognized. */
bucknum = (addr % ACCEL_HASH_SIZE);
for (ptr = accelentries[bucknum]; ptr; ptr = ptr->next) {
if (ptr->addr == addr)
break;
}
if (!ptr) {
if (!new_func) {
return; /* no need for a new entry */
}
ptr = (accelentry_t *)glulx_malloc(sizeof(accelentry_t));
if (!ptr)
fatal_error("Cannot malloc acceleration entry.");
ptr->addr = addr;
ptr->index = 0;
ptr->func = NULL;
ptr->next = accelentries[bucknum];
accelentries[bucknum] = ptr;
}
ptr->index = index;
ptr->func = new_func;
}
glui32 do_gestalt(glui32 val, glui32 val2)
{
switch (val) {
case gestulx_GlulxVersion:
return 0x00030102; /* Glulx spec version 3.1.2 */
case gestulx_TerpVersion:
return 0x00000502; /* Glulxe version 0.5.2 */
case gestulx_ResizeMem:
#ifdef FIXED_MEMSIZE
return 0; /* The setmemsize opcodes are compiled out. */
#else /* FIXED_MEMSIZE */
return 1; /* We can handle setmemsize. */
#endif /* FIXED_MEMSIZE */
case gestulx_Undo:
return 1; /* We can handle saveundo and restoreundo. */
case gestulx_IOSystem:
switch (val2) {
case 0:
return 1; /* The "null" system always works. */
case 1:
return 1; /* The "filter" system always works. */
case 2:
return 1; /* A Glk library is hooked up. */
default:
return 0;
}
case gestulx_Unicode:
return 1; /* We can handle Unicode. */
case gestulx_MemCopy:
return 1; /* We can do mcopy/mzero. */
case gestulx_MAlloc:
#ifdef FIXED_MEMSIZE
return 0; /* The malloc opcodes are compiled out. */
#else /* FIXED_MEMSIZE */
return 1; /* We can handle malloc/mfree. */
#endif /* FIXED_MEMSIZE */
case gestulx_MAllocHeap:
return heap_get_start();
case gestulx_Acceleration:
return 1; /* We can do accelfunc/accelparam. */
case gestulx_AccelFunc:
if (accel_find_func(val2))
return 1; /* We know this accelerated function. */
return 0;
case gestulx_Float:
#ifdef FLOAT_SUPPORT
return 1; /* We can do floating-point operations. */
#else /* FLOAT_SUPPORT */
return 0; /* The floating-point opcodes are not compiled in. */
#endif /* FLOAT_SUPPORT */
#ifdef GLULX_EXTEND_GESTALT
GLULX_EXTEND_GESTALT
#endif /* GLULX_EXTEND_GESTALT */
default:
return 0;
}
}
